A great dac/headamp. Can easily drive even my Beyerdynamic DT990 250Ω and as dac sounds superb. Three different inputs (spdif, usb and analog) and a display which gives you information about anything that matters, like remaining battery power. Highly recommended item, in a small price.

I bought this little thing two times off banggood, as I really love it. Prices have risen a little since this thing became more popular, but it is still worth the money.
The build quality is really solid, it looks good and it feels good. More important it sounds good. It is powerful enough to power a HD600, but I would not go too far beyond that :)
I can not describe the sound quality in audiophile words. If you are interested in this you should visit head-fi to read more about the sound of this